#include<stdio.h>
int main()
{
	int year,month;
	scanf("%d %d",&year,&month);
	switch(month) {
		case 4:
		case 6:
		case 9:
		case 11:
		printf("30\n");break;
		case 2:
		if(year%400==0||(year%4==0&&year%100!=0))
		printf("29\n");
		else 
		printf("28\n");
		break;
		default :
		printf("31\n");	
	}
	return 0;
}
